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Buell Forum » Old School Buell » Archive through June 19, 2017 » S1 shifter shaft installation and adjustment. « Previous Next »

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Steven_vuyk
Posted on Wednesday, April 12, 2017 - 03:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hi guys. When i installed my shifter shaft i followed the instruction in the manual of lining up the shifter fork shaft with the drill bit etc. It came out a lot better than it was but im still missing 3rd gear every now and then. Does anyone have a video or tips on perfect adjustment for this shaft.

I also set the primary chain to spec and is 100% .
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651lance
Posted on Wednesday, April 12, 2017 - 07:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does the transmission go into 3rd and then in to 4th or is it popping out of 3rd? Is it shifting hard? Is it popping out during deceleration?
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Natexlh1000
Posted on Wednesday, April 12, 2017 - 08:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you're missing a specific gear, the problem is probably inside.
May be something easy though like the detente plate thing getting loose on the end of the shift drum. This is in the primary BTW.
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Jim2
Posted on Wednesday, April 12, 2017 - 08:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The book spec for primary chain is wrong. It's too tight. You should fix that, re-adjust clutch and try again to see if that helps.

Too tight means that not only can it be harder to adjust for good shifting and easy neutral but it will eat away at your shaft bearings over time causing them to fail prematurely.
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Upthemaiden
Posted on Thursday, April 13, 2017 - 08:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Let us know what you find out, because I sometimes miss 3rd gear on my bike as well. It's fine 90-95% of the time, but on occasion if I don't give it enough of a push with my toe when I'm shifting from 2nd to 3rd, it'll miss the gear and not catch, so I'll have to kick the shifter up again. I think I've just grown accustom to shifting a little harder on this bike than I have on other bikes I've owned.
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Ralph
Posted on Thursday, April 13, 2017 - 09:32 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If your problem is shifting into third and popping back out then it may be the shift drum. The shift drum slot for third has a sharp turn. The shift fork pin hits the apex of the turn and can drive up a burr. That in turn digs into the ID of the shift fork and drags on it, slowing it down and using energy making for incomplete engagement of the transmission dogs. When the dogs have less than perfect engagement they can pop apart under load making for a false neutral. Every time that happens it wears the tips of the dogs a little bit until they are rounded over so it just gets worse and worse until you wear the dogs out.

Repair is pretty simple;

Stone the burr off of the shift drum or replace it

Hone the inside of the shift fork, or replace it

Replace all the affected gears (there are FOUR of them but you may be able to get by with only replacing two - depends on how bad it is)

It's easy to pop the transmission out. I would suggest that you consider inspecting it sooner rather than later.

(Message edited by Ralph on April 13, 2017)
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Ralph
Posted on Thursday, April 13, 2017 - 09:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Up, it sounds like your problem is more related to the shift shaft being misadjusted. I'd also suggest putting the updated shift detent plate in while you're in there.
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